6866666197 has 8 divisors (see below), whose sum is σ = 7521298200. Its totient is φ = 6239890944.

The previous prime is 6866666161. The next prime is 6866666227. The reversal of 6866666197 is 7916666686.

It can be written as a sum of positive squares in 4 ways, for example, as 4049285956 + 2817380241 = 63634^2 + 53079^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6866666197 - 2¹¹ = 6866664149 is a prime.

It is a super-2 number, since 2×6866666197² = 94302209322044885618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6866666137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6963672 + ... + 6964657.

It is an arithmetic number, because the mean of its divisors is an integer number (940162275).

Almost surely, 2^6866666197 is an apocalyptic number.

It is an amenable number.

6866666197 is a deficient number, since it is larger than the sum of its proper divisors (654632003).

6866666197 is a wasteful number, since it uses less digits than its factorization.

6866666197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13928375.

The product of its digits is 23514624, while the sum is 61.

The square root of 6866666197 is about 82865.3497971257. The cubic root of 6866666197 is about 1900.7076031988.

The spelling of 6866666197 in words is "six billion, eight hundred sixty-six million, six hundred sixty-six thousand, one hundred ninety-seven".